Attachment for turret-lathes



(No Model.) 3 Sheets-Sheet 1.

J. HARTNBSS. ATTACHMENT POR TURRBT LATHES.

Patented Aug. 3, 1897.

| wil WTNESEES: 1 ./JT NW. l Q @MQW Tm: "cams uns co. 10101 1 (NoModel.) 3 Sheets-Sheet 2.

J. HARTNESS.

ATTACHMENT FOR TURRET LATHES.

!NVENTD Patented Aug. 3,1897.

FSA;

3 Sheets-Sheet 3.

(No'Model.)

J.y HARTNESS. ATTACHMENT POB. TURRBT LATHES.

No. 587,480. Patented Aug. 3,1897.'

NITED STATES ATENT Fries.

ATTACHMENT FOR TURRET-LATHES.

SPECIFICATION forming part of' Letters Patent No. 587,480, dated August3, 1897.

Application filed .Tune 11, 1896. Serial No. 595,073. (No model.)

To all whom it may concern.:

Be it known that I, JAMES HARTNEss, of Springfield, in the county ofWindsor and State of Vermont, have invented certain new and usefulImprovements in Attachments for Turret-Lathes, of which the following isa specification.

This invention relates to metalturning lathes, and more particularly toturret-lathes of the type shown in my former patent, No. 457,967,granted August 18, 1891; and the invention contemplates certainattachments to such a lathe whereby one or more broad tools can bebrought to bear on the work entirely independent of the turret and itsadjuncts, while at the same time perfect control of such broad tools isassured. The invention also has in view to provide improved means foroperating the tool-slide carrying the broad tools on the turret, wherebygreat leverage is obtained and accidents to the operator andto the partsof the machine avoided.

Although, as above stated, the invention has been specially devised forapplication to a lathe of the type shown in my former patent, No. 457,967, yet it is capable of adaptation to other types of lathes and isnot limited in this respect.

With the above-stated objects in view the invention consists in certainnovel constructions and combinations of parts, which are recited in theappended claims.

The drawings which accompany and form part of this specificationillustrate an embodiment of the invention.

Figure 1 shows a side elevation of a lathe equipped with myimprovements. Fig. 2 shows a section on line 2,2 of Fig. l, lookingtoward the right. Fig. 3 shows a sectionon line 3 3 of Fig. 1, lookingtoward the right. Fig. 4 shows a section on line 4 4 of Fig. l. Fig. 5represents a top plan view showing the broad-tool attachment partly insection. Fig. 6 shows a top plan view, on an enlarged scale, of theturret attachment.

The broad-tool attachment as applied to a lathe of the type shown in myprior patent above referred to is of the followin g-describedconstruction A main body or frame piece o, in the form of a hollowcasting, embraces the automatic' chuck of the lathe, as shown moreclearly in Fig. 5, and is securely bolted to the headblock a of thelathe, the latter being specially prepared for it. The frame`piece orstandard o rises somewhat above the level of any part of the turret andconstitutes a support for one end of a rod or bar b, extendinglongitudinally ofthe lathe and above the turret, beyond which is locateda standard b to support one end of said rod. It will be seen that thisrod or bar does not interfere in any way with the operations of theturret or its appurtenances. At a point a short distance from thestandard a the rod or bar b supports a hanger o, which is rigidlyaffixed to it and is formed in its depending portion with holesreceiving the ends of short shafts d, whose opposite ends are supportedand fastened in the standard a. J ournaled upon these shafts are a pairof frames c and e', which constitute tool-holders and are designed to beswung upon the shafts into and out of operative position. Said framesare here shownas holding broad circular tools f, designed to turnbicycle-hubs; but of course various other forms of tools can beemployed, according to the work in hand, and, if necessary, the holderscan be modified to accommodate them. The tools are arranged to operatesimultaneously on opposite sides of the Work, and the holder or frames eand e are moved toward each other by cams e2 e3, respectively, said camsbearing against the rear sides of the frames, which are formed withshoulders or surfaces suitable for the purpose, as shown in Fig. 2. Itwill be observed that these cams are cut away sufficiently to permit thetool-holders to be swung upwardly to or slightly beyond the horizontalwhen not in use. has a handle g, and intermeshing gears h h', carriedbythe holders, transmit'the swinging motion, from one tothe other.

The cam e2 is affixed on a shaft e5, journaled in the standard ct andcarrying a Worm-wheel e6, which is engaged by a worm e7, formed on aquill or sleeve e8, carrying a hand-wheel e9. A shaft elo extendsthrough said sleeve and constitutes a support for it, said shaft beingjournaled in bearings on the standard ct and carrying at its outer endan operating handwheel en and at its opposite end on the other side ofthe standard a a worin cl2, which meshes into a worm-wheel cl3, affixedon the For this purpose one of theY holders.

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shaft 614, which carries the cam e3. A setscrew @15, entered through aboss on the sleeve e8 over a slot in said sleeve, provides means forlocking the sleeve and shaft together, so that both tool-holders may besimultaneously operated by the turning of one of the wheels e9 or en.W'hen the set-screw is withdrawn, the said hand-wheels can beindependently turned to separately move thev Jtool-holders.

Of course the cams could be worked by power through suitableconnections, and it is within the province of my invention to resort tosuch an expedient when desirable.

Passing now to the improved turret attachment, it is iirst to be statedthat this feature of my invention has been designed particularly todisplace the lever shown in my former patent for feeding the tool-slideon the turret.

Referring to Fig. 6, the letter Il designates the laterally-movabletool-slide, which is formed in its rear edge with a rack, as usual,which is engaged by a pinionj on a spindlej. In the arrangement shown inmy former patent a lever is attached to this spindle and is manipulatedby the operator. In the present case a large gear-wheelj2 is afiiXed onthe upper end of the said spindle, and a loose or idle gear js mesheswith said large gear and also with a pinion jl, formed on or affixed tothe stem of a handle pivotally mounted with its center of rotationcoincident with that of the turret. This handle may be composed of acentral boss j5, as shown, with radiating arms j, giving it the form ofa pilot-wheel, or it may be an ordinary hand-wheel, such as e9, Fig. 3.

The purpose of the above-described means for operating the tool-slide ispartly to obtain a greater leverage and partly to locate the handlecentrally over the turret, so as to overcome an objection to the formerarrangement in that the quick operation of the turret sends the leverflying loose to strike the operator or interfere with other mechanism ofthe lathe.

It is to be understood that the invention herein disclosed is capable ofembodiment in different forms than shown, and is not therefore limitedin this respect.

I claiml. An attachment for turret-lathes, comprising standards on thelathe-bed on opposite sides of the turret and at the ends of theturret-slideways and projecting beyond the plane of the top of theturret; a stationary rod or bar supported by said standards at the outerparts thereof and extending over the turret; and tool-holders swung fromsaid rod or bar.

2. An attachment for turret-lathes,the same comprising asupporting-frame constructed and arranged to be mounted on the lathewithout forming an obstruction to the turret or its adjuncts; one ormore tool-holders pivotally supported at the outer part of said frame soas to swing laterally; and means for adjusting said holders on theirpivots without permanent engagement therewith but with provisions forpermitting the said holders to be swung free of said adjusting means toleave an unobstructed space for the turret and its adjuncts,substantially as described.

3. An attachment for turret-lathes, comprising a frame constructed toembrace the lathe-chuck; 011e or more tool-holders located outwardlybeyond said frame to overhang the lathe-bed and pivotally supported fromsaid frame; and means for controlling the position of said tool-holderswith provisions for permitting the same to be swung out of the way toleave an unobstructed space for the turret and its adj uncts.

4E. An attachment for turret-lathes, comprising a frame constructed toembrace the lathe-chuck one or more tool-holders located outwardlybeyond said frame to overhang the lathe-bed and pivotally supported fromthe said frame; and means for adjusting the hold- 4ers on their pivotswith provisions for permitting the said holders to be swung out of theway, said means being arranged in the frame between the lathe-chuck andthe lathebed.

5. An attachment for turret-lathes, comprising standards mounted 011 thelathe-bed on opposite sides of the turret and at the ends of theturret-slideways and projecting beyond the plane of the top of theturret; a fixed rod or bar supported by said standards and extendingover the turret; a hanger fastened to and supported by said rod or bar;shafts supported between said hanger and one of the standards; andswinging tool-holders on said shafts.

6. An attachment for tur1'et-lathes,the same comprising asupporting-frame constructed and arranged to be mounted on the lathewithout forming an obstruction to the turret or its adj uncts; one ormore tool-holders pivotally supported at the outer part of said frame soas to swing laterally toward and from the work; and one or more camsengaging the holder or holders on the outer side to advance the sametoward the work, with provisions for permitting the holder or holders tobe swung free to leave an unobstructed space for the turret and its adjuncts, substantially as described.

7. An attachment for lathes, the same comprising a suitable framework orsupport, a pair of tool-holders pivotally supported by the same, camssupported behind said toolholders and bearing against them, and meansfor operating said cams with provision for simultaneously orindependently moving them.

8. An attachment for lathes, the same comprising a suitable framework orsupport, a pair of tool-holders pivotally supported there- IOO IIO

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by, cams supported behind said tool-holders and bearing against them,Worm-Wheels associated with said cams, a shaft carrying a worm inengagement with one of said wheels, a sleeve or quill on said shaft andhaving a worm engaging the other of said wheels, and means forconnecting together and disconnecting said shaft and sleeve.

9. An attachment for lathes, the same comprising a body 0r frame piececonstructed to embrace the lathe-chuck, a rod orbar supported at one endby the said frame-piece, a support for the opposite end of said rod orbar, a hanger on said rod or bar, shafts supported between saidframe-piece and said hanger, tool-holders pivotally mounted on saidshafts, and means for controlling said tool-holders.

l0. In a turret-lathe, the combination with the laterally-movabletoolslide, having a rack, of a spindle carrying a pinion in mesh withsaid rack and a larger gear-wheel, a handle pivoted over the middle ofthe turret and carrying a pinion, and a loose intermediate gearconnecting said pinion with the large gear on the before-mentionedspindle.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 27th day of May, A. D. 1896.

JAMES HARTNESS.

Vitnesses:

E. R. FELLows, E. E. WOOD.

